The simplest way to make a popsicle is to use a small paper cup or yogurt container, fill it with juice (or whatever else you choose to use as a base for popsicles) and put a popsicle stick into it as it firms up in the freezer.

Companies that currently offer this service will typically freeze a person's severed head -- fondly referred to as a "popsicle" in the longevity community -- with the idea of eventually thawing it out and transplanting it onto a robotic torso, one invulnerable to the ailments that killed the actual body.